Home / 1,912.46-2,868.41-613.76

Finding the Fourth Proportional to 1,912.46, 2,868.41 and 613.76

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Solution

The fourth proportional to 1,912.46, 2,868.41 and 613.76 is: 920.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,912.46 : 2,868.41 = 613.76 : x
  2. Step 2: Convert to fraction form
    1,912.46/2,868.41 = 613.76/x
  3. Step 3: Cross multiply
    1,912.46x = 2,868.41 × 613.76
  4. Step 4: Simplify right side
    1,912.46x = 1,760,502.51
  5. Step 5: Solve for x
    x = 1,760,502.51/1,912.46
  6. Step 6: Final answer
    x = 920.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.